Thunder Client alternatives: 6 apps ranked by verified data

Facts checked Oct 25, 2026AppBreakup editorialHow we rank

Common reasons people leave Thunder Client: free tier has usage limits, and some formerly free features now need a paid plan. We ranked 6 alternatives by how directly each one replaces Thunder Client, then by reviews, real visits and how recently each app's facts were checked against its own website. REST Client for VS Code currently ranks first.

Quick comparison

#	App	Pricing	Open source	Platforms	Verified facts	Score
1	Postman	Free plan + paid	No	Web, Windows, macOS +1	0 of 3	51.3

1. PostmanTop pick
Best for: Teams that want a full API lifecycle platform
Free plan + paidWeb, Windows, macOS, Linux
51.3
score / 100
Why switch from Thunder Client
A full desktop platform with team workspaces, mocks and monitors.
Pros
Covers design, testing, docs and monitoring
Supports REST, GraphQL, gRPC
Huge public API network
Cons
Pushes cloud accounts and sync
Heavy for simple request testing
Visit Postman Details and reviews
How this score is calculated
Editorial fit ×0.377
Reviews ×0.363
Clicks (90 days) ×0.150
Freshness ×0.1530
Votes ×0.150
0 counted reviews, 0 up and 0 down votes. Full formula
Is Postman a good Thunder Client alternative?
Verified facts
0 of 3 verified
Free plan
Yes
Not checked yetpostman.com(opens source in a new tab)
Protocols
REST, GraphQL, gRPC, WebSocket
Not checked yetpostman.com(opens source in a new tab)
Platforms
Web, Windows, macOS, Linux
Not checked yetpostman.com(opens source in a new tab)

The best Thunder Client alternative for…

The highest-ranked app in this list for each need.

Best Thunder Client alternative for most people

REST Client for VS Code

A free, open-source VS Code extension that sends requests from plain .http files.

Best Thunder Client alternative for a free option

httpYac

Open-source .http file runner for VS Code and the command line.

Best Thunder Client alternative for a free plan you can upgrade

Yaak

A fast standalone desktop client that is free for personal use.

Best Thunder Client alternative for open source

Bruno

Free, open-source desktop client that also keeps collections in Git.

Best Thunder Client alternative for Mac

Insomnia

A standalone desktop client with REST, GraphQL and gRPC plus Git sync.

Best Thunder Client alternative for Windows

Postman

A full desktop platform with team workspaces, mocks and monitors.

Best Thunder Client alternative for Linux

REST Client for VS Code

A free, open-source VS Code extension that sends requests from plain .http files.

Best Thunder Client alternative for working in the browser

Postman

A full desktop platform with team workspaces, mocks and monitors.

Thunder Client alternatives: common questions

What is the best alternative to Thunder Client?

REST Client for VS Code ranks first right now. A free, open-source VS Code extension that sends requests from plain .http files. httpYac and Bruno follow it in our ranking.

Is there a free alternative to Thunder Client?

Yes. REST Client for VS Code (open source), httpYac (open source), Bruno (open source) and Insomnia (open source) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Thunder Client?

Yes: REST Client for VS Code, httpYac, Bruno and Insomnia, plus 1 more in the list above.

Which Thunder Client alternatives work on Linux?

REST Client for VS Code, httpYac, Bruno, Insomnia and Yaak run on Linux.

Why do people switch from Thunder Client?

The complaints we hear most: free tier has usage limits; some formerly free features now need a paid plan; less suited to very large collections.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Thunder Client, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.